MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 11/10/01 through 11/16/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 76 522 598
Davis 379 20 399
Irvine 188 0 188
Los Angeles 0 150 150
Riverside 17 46 63
San Diego 27 171 198
San Francisco 151 0 151
Santa Barbara 4 83 87
Santa Cruz 9 43 52
LBL 0 56 56
LLL 0 58 58
Los Alamos n/a 0 0
Other - UC 1 44 45
U.S. Forestry 0
Other-Network UC n/a 520 520
_______ ______ _____
852 1,713 2,565
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 33 106 809
2-4 a.m. 20 118 7,697
4-6 a.m. 25 84 828
6-8 a.m. 89 355 3,136
8-10 a.m. 342 915 6,421
10-12 a.m. 507 1,386 9,661
12-2 p.m. 471 1,310 12,425
2-4 p.m. 458 1,296 12,294
4-6 p.m. 338 861 8,892
6-8 p.m. 139 391 4,143
8-10 p.m. 76 258 2,146
10-12 p.m. 67 241 2,870
__________ __________ __________ _________________
Total: 2,565 7,321 71,322
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 234 1,563 1,797
Davis 1,025 32 1,057
Irvine 464 0 464
Los Angeles 0 372 372
Riverside 29 103 132
San Diego 97 458 555
San Francisco 411 0 411
Santa Barbara 4 308 312
Santa Cruz 7 110 117
LBL 0 163 163
LLL 0 216 216
Los Alamos n/a 0 0
Other - UC 1 125 126
U.S. Forestry 0
Other-Network UC n/a 1,599 1,599
_______ ______ _____
2,272 5,049 7,321
Number of FIND commands by database
CC database 7,235
CCT database 86
Total number of FIND commands 7,321
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,204 15,178 17,382
Davis 6,696 153 6,849
Irvine 11,173 0 11,173
Los Angeles 0 2,973 2,973
Riverside 274 769 1,043
San Diego 569 4,761 5,330
San Francisco 6,958 0 6,958
Santa Barbara 4 4,274 4,278
Santa Cruz 116 1,297 1,413
LBL 0 1,412 1,412
LLL 0 1,167 1,167
Los Alamos n/a 0 0
Other - UC 2 1,503 1,505
U.S. Forestry 0
Other-Network UC n/a 9,839 9,839
_______ ______ _____
27,996 43,326 71,322
Number of Records Displayed by database:
CC database 68,679
CCT database 2,643
Total number of Records Displayed 71,322
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.6%
Percent of CCT sessions 3.4%
Percent of searches done in the CC database 98.8%
Percent of searches done in the CCT database 1.2%
1.5 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.3
Standard deviation in seconds 5.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 5.0
2.0 CC Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 275:08
Average number of searches completed per session 2.9
Retrievals per search - median 8.0
Retrievals per search - average 556.9
Retrievals per search - standard deviation 5268.7
Percent of searches completed with 0 results 23.4%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 86.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 6,542 37.2%
DISPLAY (excluding automatic displays) 5,135 29.2%
HELP 167 0.9%
EXPLAIN 164 0.9%
SET/RESET 1,145 6.5%
SHOW 29 0.2%
ADD ON (AND, OR, AND NOT) 693 3.9%
LOGON or LOGOFF 2,789 15.9%
COMMENT 0 0.0%
SAVE 218 1.2%
USE 1 0.0%
OTHER 696 4.0%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 3,117 42.6% 493 15.8% 29 204.5 904.0
TITLE WORD 2,304 31.5% 730 31.7% 11 891.7 7601.4
EXACT TITLE 126 1.7% 50 39.7% 2 54.3 338.1
JOURNAL 451 6.2% 160 35.5% 464 4361.5 10752.7
EXACT JOURNAL 158 2.2% 66 41.8% 1,230 3219.3 5871.5
SUBJECT CAT 21 0.3% 2 9.5% 12 34.9 61.9
SUBFILE 31 0.4% 4 12.9% 45 94.1 134.5
PUBLICATION TYPE 16 0.2% 3 18.8% 39 19603.0 68763.1
LANGUAGE 8 0.1% 2 25.0% 14 47.8 76.4
DATE 167 2.3% 25 15.0% 12 235.9 1735.8
ADDED 24 0.3% 7 29.2% 11 15.8 21.3
PERIODICAL 473 6.5% 64 13.5% 4 33.1 286.9
EXACT PE 90 1.2% 13 14.4% 2 11.4 34.7
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 330 4.5% 112 33.9% 21 992.5 3540.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 776 11.9% 238 30.7% 5 104.7 936.6
Single 5,739 88.1% 1,251 21.8% 28 873.3 6648.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.7%
SHORT 73.7%
LONG 4.8%
FIELDS 1.1%
PERIODICALS 12.4%
COMMENTS 0.0%
Other 1.4%
2.1 CCT Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 104:15
Average number of searches completed per session 1.0
Retrievals per search - median 8.0
Retrievals per search - average 176.0
Retrievals per search - standard deviation 712.2
Percent of searches completed with 0 results 41.9%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 86 20.2%
DISPLAY (excluding automatic displays) 130 30.6%
HELP 37 8.7%
EXPLAIN 13 3.1%
SET/RESET 56 13.2%
SHOW 7 1.6%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 83 19.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 13 3.1%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
JOURNAL 61 70.9% 28 45.9% 120 397.0 1113.2
EXACT JOURNAL 17 19.8% 8 47.1% 153 221.2 244.5
SUBJECT CAT 0 0.0% 0 0.0% 0 0.0 0.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 8 9.3% 0 0.0% 4 5.5 5.5
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 86 100% 36 41.9% 95 302.7 916.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.0%
ISSUES 47.1%
SHORT 25.0%
LONG 14.3%
PERIODICALS 8.6%
COMMENTS 0.0%
Other 0.0%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
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Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. First word of command is invalid 30.3%
2. NS command - no next screen 27.6%
3. FIND command with invalid index name 9.9%
4. Index invalid in current database 4.0%
5. Max. # of ports to a Z39 db are in use 3.5%
6. D ABS command in database w/o abstracts 2.6%
7. PS command - no previous screen 2.3%
8. Search term missing from search command 2.3%
9. DISPLAY command contains invalid word 2.2%
10. F SUB CAT search with invalid SC 1.9%
11. All others 13.4%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 24.3%
2. FIND (CC DB) 12.4%
3. LOCATE (ARTICLE DBS) 11.3%
4. CC INDEXES 7.9%
5. Unrecognized term 5.1%
6. COMMANDS 4.0%
7. DATABASES 2.8%
8. DISPLAY 2.8%
9. CC DATABASE 2.8%
10. FIND (CCT DB) 2.8%
11. All others 23.7%
Ten most frequent HELP situations:
1. First word of command is invalid 17.1%
2. Help requested from START CC command 13.6%
3. F/BR with index invalid in current DB 9.4%
4. FIND command with invalid index name 7.3%
5. FIND command with zero results 6.3%
6. FIND command retrieves >1 book 4.7%
7. DISPLAY command-first of >1 screen 4.7%
8. DISPLAY command - middle of >1 screen 4.7%
9. Help requested from SET DB command 4.5%
10. DISPLAY command-complete in one screen 2.1%
11. All others 25.5%
Ten most frequent SHOW requests:
1. HISTORY 58.3%
2. SYSTEM NEWS 11.1%
3. CC NEWS 8.3%
4. SEARCH 8.3%
5. LIBRARY NEWS 2.8%
6. TIME 2.8%
7. 5101 2.8%
8. CC GLOSSARY 2.8%
9. DATABASES 2.8%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)